JP2002504757A - Rack device for inserting printed boards - Google Patents

Abstract

(57) Summary The installation location front elements (52, 8) are provided with protruding plug-in / pull-out centering / contact elements (13, 49). Corresponding to the centering and contact elements (13, 49), a receiving element (16) made of a conductive material is provided, which is mounted on the connecting rail with low resistance. During the insertion process of the front element, the receiving element and the centering / contact element are centered and contacted with each other, and in the inserted state, a low-resistance mechanical connection with a large adhesive force and a large current carrying capacity are provided. Make electrical contact.

Description

DETAILED DESCRIPTION OF THE INVENTION

The present invention relates to a rack device for inserting a printed board having a subrack with an installation place.

The subrack of such a rack device provides a volume element provided for inserting a printed board. The volume elements are also called so-called installation locations and are generally arranged side by side parallel to one another. Printed boards are inserted into these installation locations, in which case the printed boards are likewise arranged side by side.

FIG. 1 illustrates a standard basic configuration of a subrack 50. The housing space of the printed circuit board is defined by connecting lateral rails of opposing conductive material. In the example of FIG. 1, there are two lower connection lateral rails 36 and 37 and two upper connection lateral rails 38 and 39. The connecting rails 36, 38 define the front side of the subrack 50, i.e. the plug-in side 3 provided for carrying the printed circuit board.
5 are defined. The two connecting rails 37, 39 define the back of the subrack 50, which is closed, for example, with a so-called back panel print board.

The connecting lateral rails 36, 37, 38, 39 have their side faces mounted, for example, inside a switchgear. In the example of FIG. 1, there are vertical side walls 40, 41 on both sides, to which connecting lateral rails are screwed on the sides. The upper side or lower side of the subrack 50 is closed by the upper cover plate 47 or the lower cover plate 48. To close the insertion side 35 of the subrack 50, a plurality of so-called front elements are provided. These front elements are assigned to individual installation locations inside the subrack, are adapted to their width, and are configured to be pluggable or extractable. This front element can be closed irrespective of whether the installation area behind it is occupied by a printed board. Thus, on the one hand, the empty installation site is plugged into the insertion side 35 of the subrack 50 and closed with a front element in the form of a blank space closure cover. On the other hand, since the printed board is provided with a front element on its end face, when the printed board is inserted into the subrack 50, the front element closes its installation site at the plug-in side 35.

In the example of FIG. 1, two installation locations 44 located on the left side of the subrack 50,
For 45, front elements 52, 8 are present. The front element is formed, for example, in a multi-part structure. That is, the front element 8 has a vertical front panel 9 made of a conductive material. Terminal members 10 and 1 made of a conductive material are similarly provided on the upper end surface and the lower end surface of the front panel 9, respectively. For example, so-called lever handles 12, 2 are rotatably supported by these end members. These lever handles are operated by an operator, in particular by a rocking movement, so that at least the front element 8 can be easily inserted or pulled out.

In the example of FIG. 1, the front element 52 has already been completely pushed into its mounting location 44 to close it, and lies in the plane of the insertion side 35 of the subrack 50. The front element 8 of the installation location 45 is, for example, a printed board 5
1 is tightly bound. The connection is advantageously made with the help of the upper and lower end members 10,1. The printed board has already been inserted deep into the installation location 45. When it is pushed completely into the installation location 45, the front element 8 is also flush with the front element 52 in the plane of the plug-in side 35.

When plugging in the front element or the unit consisting of the front element and the printed circuit board, the front element must be aligned in the plugging direction, especially just before reaching the fully inserted state. This prevents, in particular, lateral displacement of the front element. Such a lateral displacement may prevent a complete insertion of the front element or, in some circumstances, lead to a setback. This alignment effect is necessary, in particular, when the next installation site is already closed on the plug-in side with a front element. In this case, the front element to be inserted must be inserted into the freely open opening of the installation location as precisely as possible. Furthermore, it is necessary to prevent the front element from slipping out after the front element has been completely pushed in, especially when the front element is firmly connected to a printed circuit board present inside the installation location. It must also ensure that the front element makes conductive contact with the subrack, especially with its connecting cross-rail, especially when the front element and its parts are made of widely conductive materials. This connects the front element and the protective contact device of the subrack, whereby, for example, a large fault current is also shunted from the front element to the subrack, so that a system protection device, for example a load disconnector or a fault current protection switch, Tripped at a rate that guarantees personal security.

Various methods are already known for aligning and protecting the front element.

[0009] In EP 0 579 859 a printed circuit board with guide pins for inserting it into a subrack in a precise position is known. In that case, there are two guide pins on the outer surface of the corner assembly of the printed board for alignment. When the printed board is inserted, these guide pins are supported in contact with the side surface of the head of the vertical guide rail located opposite to the guide pins. In addition, a ground contact pin is arranged between the two guide pins, and when the printed board is inserted, the ground contact pin is provided in a coding chamber with a ground contact spring at the end face of the head located opposite to the vertical guide rail. Go into it. The corner assembly also has an assembly hole for receiving a screw. The screw is connected to the retaining means to prevent the printed board from coming off. This holding means is supported in the receiving transverse slit of the connecting transverse rail. This arrangement has, first of all, the disadvantage that there are four different components to provide an alignment function, a ground contact function, and a slip-out prevention function. Another disadvantage is that the means provided for ground contact are not sufficient for the protective contact function. This also impairs the function of the coding element and the coding room.

[0010] Further, in WO 96/42187, a front panel system for a printed board having an active / passive switching section is known. Here, a guide pin is provided on the terminal member of the printed board for positioning so as to engage with a guide hole located opposite thereto. In this arrangement, auxiliary screws are provided on the terminal member to prevent the terminal member from coming off. This screw, when the printed board is inserted,
It is screwed into a threaded rail which is supported in a lateral groove inside the oppositely located connecting lateral rail. This arrangement also has the disadvantage of a multi-segment structure. Furthermore, there is no auxiliary element for the electrical protective contact between the front element and the connecting lateral rail.

[0011] Further, in WO 97/49270, centering (positioning) is described.
A subrack with a pluggable printed board with a possible front panel is known. At one end of the front panel is a screw extending through the front panel. Guide means extending in the lateral direction are further supported on the connecting transverse rail located opposite thereto. When the printed board with front panel is inserted into the corresponding subrack, the screw contacts the guide means. The guide has a centering portion located forward and a threaded portion located behind it. In this embodiment, the centering portion is formed by a centering strip having equally-spaced centering holes, and the threaded portion is formed by a strip having a threaded hole located behind it and having equally-spaced screw holes. . This arrangement has the disadvantage that the relevant components need to be tightly aligned. Furthermore, there is no auxiliary element for electrical protective contact between the front panel and the connecting lateral rail.

An object of the present invention is to provide a centering (positioning) function of a front element of a printed board when a printed board is inserted into an installation place, and a function of preventing a front element with a printed board from being loosened or coming out of the installation place. The object is to provide a device for inserting a printed circuit board in which the protective contact function of the front element of the printed circuit board in the inserted state is achieved simply and reliably.

This problem is solved by a rack device according to claim 1. Advantageous embodiments of the invention are described in the dependent claims.

The rack device according to the invention comprises a subrack having a mounting location for inserting a printed circuit board, the subrack being formed of conductive materials which are situated opposite one another to define a mounting location. It has at least a rail. There is a pluggable / pullable front element made of a conductive material for its installation location, which front element at least comprises a pluggable / pullable centering / contact element protruding in the direction of the plug side of the subrack. ing. In addition, there is a housing element for a pluggable / pullable centering / contact element made of a conductive material which is provided at each mounting location and is mounted on the connecting cross rail with low resistance on the plug side of the subrack. The receiving element and the pluggable / pullable centering / contacting element are already mechanically aligned and in contact with each other during the plugging process, and in the plugged-in state, a seismic mechanical contact with a large adhesive force and a large current carrying capacity. To form a low-resistance electrical contact having

[0015] The rack device according to the invention has a structural design, in particular of a centering and contact element connected to the front element and a receiving element positioned opposite it and its low-resistance contact with the connecting transverse rail. It has special advantages based on Due to its structural formation, a mechanical centering function during the insertion process, a mechanical anti-seizure device in the fully inserted state, and an electrical with a large current capacity corresponding to the requirements imposed on the protective contact device The three functions of the low-resistance contact function can be simultaneously satisfied. In particular, according to the invention, in the case of the arrangements known in the prior art, the auxiliary element which is activated between the front element and the connecting cross rail when the front element and the printed circuit board connected thereto are fully inserted. The screw connection device can be omitted.

In an advantageous embodiment of the rack device according to the invention, there are connection means for durably connecting the receiving element to the connecting cross rail with low resistance. This coupling means is preferably formed in the form of a screw coupling device and forms a connection with low resistance, durability and high current carrying capacity. This connection also satisfies the requirements imposed on the protective contact device.

In the rack device according to the invention, the guide rails are installed in pairs on the connecting transverse rails, in particular, in order to facilitate the insertion of the printed board into the installation location. In this case, it is advantageous for the at least one receiving element to be arranged on the connecting rail next to the guide rail at the installation location, in particular near the head end of the guide rail. The receiving element is advantageously formed in the form of a block. In such an overall arrangement, it is advantageous for at least one storage element and at least one corresponding guide rail for each installation location to be integrally formed of a conductive material in the form of a single part.

In another particularly advantageous embodiment of the rack arrangement according to the invention, auxiliary contact means are present between the receiving element and the centering and contact element. This further improves the mechanical clamping or adhesion and the electrical contact between the two elements.

The auxiliary contact means is connected to the centering and contact element in the first embodiment.
The connection is advantageously made by attaching auxiliary contact means to the centering and contact element, in particular at its front contact site. This type of installation is advantageous when the centering and contact elements are formed in particular in the form of cylindrical pins and the auxiliary contact means are in the form of a cage spring with outwardly curved spring contact plates. It can be done even more easily. When the receiving element has a first insertion opening on the side of the subrack located on the insertion side, the centering and contact of the front element with auxiliary contact means in this first insertion opening during the pushing-in process of the front element. Even if the element is centered (aligned), it will go through. The contact means present in the first insertion opening then enhances the mechanical attachment and the electrical contact between the centering and contact element and the receiving element.

The auxiliary contact means is connected to the receiving element in a second embodiment. The connection can advantageously be made in that the receiving element has a first insertion opening for the centering and contact element on the side located on the plug side of the subrack, at the back of which an auxiliary contact means is supported in the contact chamber. . Such a receiving element preferably has a second insertion opening on the side opposite to the plug side of the subrack for inserting the auxiliary contact means into the contact chamber. Preferably, the auxiliary contact means has, on the side of the subrack opposite to the plug-in side, means for locking to the receiving element, in particular a widened pawl. This advantageously snaps into the slit in the receiving element. The locking of the auxiliary contact means with the support or the receiving element in the receiving element is further enhanced when the auxiliary contact means is in the form of a cage spring with inwardly curved spring contact plates. .

In the following, the invention will be described in detail with reference to an embodiment shown in the drawings.

In FIG. 1, which has already been partially explained, the front element 8 and the corresponding printed circuit board 51 of the installation location 45 have, according to the invention, a plug-in / pull-out that projects in the direction of the plug-in side 35 of the subrack 50. Possible centering and contact elements 13, 49 are provided. These centering and contact elements 13 and 49 are provided on, for example, the lower terminal member 10 and the upper terminal member 1, and these terminal members 10 and 1 are fixed to the end face side end of the front panel 9. The end members are also used to hold the lower lever handle 12 and the upper lever handle 2, which facilitates the insertion or removal of the unit consisting of the front element 8 and the printed board 51. The terminating members with centering and contact elements and the front panel are made of a conductive material, as are the connecting transverse rails.

The upper and lower connecting lateral rails 36, 37, 38, 39 are provided with guide rails on the inner surface facing the installation location located between these connecting lateral rails. A pair of upper and lower guide rails are attached to each installation location, and the printed board located between them is guided by these guide rails. In the example of FIG. 1, guide rails 42 and 43 are attached to an installation location 45. In an advantageous embodiment of the invention, a receiving element is provided which is assigned to the centering and contact element near the end face of each printed circuit board. In FIG. 1, the centering and contact elements 13, 49 on the front element 8 are accommodated in
, 21 are provided correspondingly. These receiving elements 16, 21 are advantageously formed integrally with the adjacent guide rails 42, 43. This will be described in detail below.

FIG. 2 shows in part in detail the lower area of the installation location 45 with the front element 8 in FIG. The front element 8 has a front panel 9, which is provided at its lower end with a terminating member 10, on which a lever handle 12 is pivotally supported via at least one rotating shaft 11. The lever handle 12 is shown only schematically in FIG. The end member 10 further has an insertion surface 35.
A centering and contact element 13 which is preferably formed in the form of a cylindrical pin is provided. Corresponding to this centering and contact element, a receiving element 16 is provided, which is advantageously block-shaped and is provided on a support surface 6 facing the subrack of the lower connecting rail 36. I have. The connecting transverse rail is of conventional construction, for example, having a generally laterally extending rail with an engagement opening for receiving an abutment element (not shown) of the lever handle 12 below the plug-in area. . Behind the rail is a lateral groove 4 into which a rail with screw holes into which, for example, mounting screws are screwed is inserted. In the example of FIG. 2, the screwed rail is not attached.
This is because in the embodiment of the front element 8 according to the invention, no fixing screws are required. The lower connection side rail 36 is screwed to the side wall plate 41 via the side end face 5, for example. Further, a series of assembly holes 7 are provided in the inner support surface 6.

In FIG. 1, the front panel 9, the end members 10, the centering and contact elements 13, the connecting lateral rails 36 and the receiving elements 16 are made of a conductive material. In order to form a particularly low resistance electrical connection with a durable large current carrying capacity, the receiving element 16
Is firmly connected to the connecting cross rail 36 via the connecting element 18. For this purpose, a bolt connection device is advantageously employed. The mounting bolt is guided, for example, via a funnel-shaped centering means 19 and passes through a block of the receiving element 16 to the assembly hole 7.

In the embodiment of the invention shown in FIG.
Has a first insertion opening 20 on the side surface 54 of the insertion side 35, and a hollow contact chamber exists behind the first insertion opening 20. As the front element 8 moves in the insertion direction 35, the centering and contact element 13 penetrates into its hollow contact chamber, where a centering action takes place. When the front element 8 is completely pushed in, the centering and contact element 13 has a large contact force between the two elements 13, 16, especially with its front contact area 14 in the accommodation chamber 28 of the accommodation element 16. It is digging in such a way that a mechanical connection as well as a low-resistance electrical connection with a large and durable current capacity are produced. As a result, the installation location 45, which is located in the insertion direction 35 behind the connecting cross rail 36 and the receiving element 16, is completely covered in front. In the embodiment shown in FIG. 1, the mounting location 45 is not occupied by a printed board, so that the front element in this case assumes the function of a so-called blind cover.

In the case of the embodiment shown in FIG. 1, an auxiliary contact means 15 is present between the centering and contact element 13 and the receiving element 16 already according to another particularly advantageous embodiment of the invention. are doing. This auxiliary contacting means is, for example, attached to the centering and contacting element 13 and is pressed against the front contacting part 14 in the form of a substantially cylindrical cage spring 15 with an outwardly curved spring contacting lamella 53. . When the centering and contact element 13 with such a cage spring 15 penetrates into the receiving chamber 28 of the receiving element 16, a mechanical and electrical connection having a particularly high compressive force and a particularly high current capacity between the two elements is established. It is formed.

FIG. 3 shows a different embodiment of the installation location 45 with the front element 8 in a diagram corresponding to FIG. The installation location is additionally provided with guide rails for printed boards, of which the lower guide rail 42 is shown in FIG. This guide rail 42 is located beside the receiving element 16 and likewise has a lower connecting lateral rail 36.
Is provided on the inner support surface 6. The guide groove 22 for the u-shaped plate exists above the guide rail 42. The printed board is inserted into the guide groove 22 through the entrance portion with the entrance inclined surface 23, is inserted into the installation location 45, and is positioned. The printed circuit board is generally rigidly connected to the front element 8 via at least a terminal element 10. The printed board is not shown in FIG. 3 for clarity.

According to a particularly advantageous embodiment of the invention, in the example of FIG. 3, the guide rail 42 and the block-shaped receiving element 16 are formed integrally from a conductive material. With the help of a single coupling element 18, the unit consisting of the guide rail and the receiving element can thereby be coupled with low resistance to the connecting rail. The one-piece structure has an advantage that the area of the side surface 54 located on the insertion side 35 of the subrack 50 can be satisfactorily divided and used. That is, in the example of FIG.
Beside the insertion opening 20 for the contact element 13 there is furthermore a 3 for a so-called coding pin.
One coding room 24 is provided.

FIG. 4 shows in detail the lower area of a further embodiment of the installation location 45 with the front element 8. This broadly corresponds to the arrangement according to FIG. 3, in which the receiving element 16 and the guide rail 42 are likewise integrally formed. However, in the embodiment of FIG. 4, the auxiliary contact element is attached to the receiving element 16 and, for example, a cage or cylindrical spring 25
And is supported inside the hollow contact chamber 28 at the back of the insertion opening 20. The front contact site 14 of the centering and contact element 13 extends into the insertion opening 20. Housing element 16
Advantageously has a second insertion opening 27 on the side opposite the plug-in side 35 of the subrack or the front side 54 of the receiving element 16. This second insertion opening is preferably arranged directly opposite the first insertion opening 20 and likewise has a hollow contact chamber 28.
It is open to. In particular, a cage-shaped spring-like auxiliary contact element 25 is provided in this second insertion opening 27.
Through and easily inserted into the hollow contact chamber and placed therein. First insertion opening 20
Can be smaller in diameter than the hollow contact chamber 28. The diameter of the first insertion opening 20 is therefore best adapted to the outer diameter of the centering and contact element 13. Furthermore, the first insertion opening 20 narrowed by this allows the cage spring 25 inserted into the wide accommodation chamber 28 from behind.
Form a secure inner support edge for Preferably, the block of the receiving element 16 additionally has a slit 26 into which the locking element at the rear end of the auxiliary contact element 25 fits, whereby the centering and contact element 13 is hollow. When penetrating into the contact chamber 28, the auxiliary contact element 25 is no longer accidentally pushed out of the second insertion opening 27. This will be described in detail below with reference to FIG.

FIG. 5 shows the section shown in FIG. 4 in detail in a sectional view. The front element 8 is then completely pushed into the installation location 45 and the connecting cross rail 36. The centering and contact element 13 is completely inserted into the receiving chamber 28 of the receiving element 16, and the contact portion 14 is in contact with the auxiliary contact element 25 with high adhesion and low resistance. This auxiliary contact element 25 is formed, for example, in the form of a cage spring which is inserted into the hollow contact chamber 28 from behind through a second insertion opening 27. The auxiliary locking element of the cage spring 25 fits into the locking slit 26 of the receiving element 16 and provides a reliable support.

FIG. 6 shows an embodiment of the auxiliary contact means between the receiving element and the centering and contact element in the form of a cage spring. This auxiliary contact means corresponds to the embodiment shown in FIGS. 4 and 5 described above and is connected to the receiving element 16 by a support device, in particular inside the hollow contact chamber 28. The cage spring 25 has a substantially cylindrical shape. The first retaining split ring 53 has a front insertion site 29 for the centering and contact element 13.
Is formed. A second retaining split ring 30 is provided at the opposite end, and the second retaining split ring 30 has a locking portion. That is, the second retaining split ring 30 has means 32 for locking the cage spring 25 with the receiving element 16. This means is preferably formed in the form of an extended pawl 32. First retaining split ring 53
Spring contact thin plates 3 curved inwardly between the spring holding plate 30 and the second holding split ring 30
4 are provided. The centering and contact element 13 is inserted into this narrowed hollow contact chamber. In particular, the material thickness of the cage spring and the width of the spring contact lamella are designed such that a large compressive force is applied to the outer peripheral surface of the inserted centering and contact element.
This forms a seismic mechanical contact with a large adhesive force and a low-resistance electrical contact with a large current carrying capacity.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rack device according to the present invention.

FIG. 2 is a perspective view of the lower area of the installation location with the receiving element and the centering and contacting element each having the front element of the first embodiment;

FIG. 3 is a perspective view corresponding to FIG. 2 of an installation location in which the receiving element and the guide rail are formed integrally in different embodiments according to the present invention.

FIG. 4 is a perspective view of the lower area of a mounting location where the receiving element and the centering and contacting element each have the front element of the second embodiment.

FIG. 5 is a cross-sectional view of a state where the front element at the installation location in FIG.

FIG. 6 shows a perspective view of an embodiment of the auxiliary contact means between the receiving element and a centering and contact element in the form of a cage spring connected to the receiving element.

[Explanation of symbols]

 1, 10 terminal member 6 support surface 8, 52 front element 13, 49 centering / contact element 14 front contact part 15 cage spring 16 accommodation element 20 first insertion opening 25 auxiliary contact means 26 slit 27 second insertion opening 28 accommodation Chamber (hollow contact chamber) 32 Locking means 35 Subrack insertion side 36-39 Connection horizontal rail 42, 43 Guide rail 44, 45 Installation location 50 Subrack 51 Printed board 54 Side surface located on subrack insertion side

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Birrenstein, Ernst Germany-91593 Burg Bernheim Schweppheim Hauptstrasse 43 F-term (reference) 5E348 AA14 AA25 DE08 DE13 EE01 EE06 EE10 EE21 EE22

Claims (20)

[Claims] An installation place (44, 4) for inserting a printed board (51).
5) A rack apparatus comprising a subrack (50) having at least: a) connecting lateral rails (36, 42) of electrically conductive material located opposite each other to define an installation location (44, 45). 37; 38, 39); and b) a conductive material comprising at least a pluggable / pullable centering / contact element (13, 49) projecting in the direction of the plug side (35) of the subrack (50). Plug-in and pull-out front elements (5) for an installation site (44, 45) consisting of
C) the subrack (50) insertion side (50) attached to each installation location (44, 45);
Plug-in / pull-out centering / contact elements (13, 49) made of conductive material which are mounted at 35) on the connecting lateral rails (36, 37; 38, 39) with low resistance.
D) a receiving element (16, 21) and a pluggable / pullable centering / contact element (16, 21).
13, 49) are: i) already mechanically aligned and in contact with each other during the plug-in process; ii) low-resistance mechanical contacts with a large adhesive force in the plugged-in state as well as a large current carrying capacity. A rack device for inserting printed circuit boards that make electrical contact. 2. The plug-in / pull-out front element (8) has a front panel (9) with at least one terminating member (10, 1).
2. The racking device according to claim 1, wherein a centering / contact element (13, 49) which can be inserted and extracted is connected to (1). 3. The racking device according to claim 2, wherein at least one terminal element of the pluggable / extractable front element is used to hold a printed circuit board. 4. Coupling means (18) for durably connecting the receiving element (16) to the connecting cross-rail (36), in particular to the inner support surface (6) on its installation site (44, 45) side, with low resistance. ), In particular comprising a screw connection device.
The rack device according to any one of the above. 5. A guide rail (42, 43) for inserting a printed board (51) installed in pairs on connecting lateral rails (36, 37; 38, 39) into an installation place (45). The rack device according to any one of claims 1 to 4, wherein: 6. At least one receiving element (1) at an installation location (45).
6. A racking device according to claim 5, wherein 6) is arranged on the connecting lateral rail (36) immediately adjacent to the guide rail (42). 7. The racking device according to claim 6, wherein the receiving element (16) and the guide rail (42) are integrally formed of a conductive material at the installation location (45). 8. The method as claimed in claim 1, further comprising a block-shaped receiving element.
The rack device according to any one of the above. 9. The racking device according to claim 1, wherein the centering and contacting elements are formed in the form of cylindrical pins. 10. A rack device according to claim 1, further comprising auxiliary contact means (15, 25) between the receiving element (16) and the centering and contact element (13). . 11. The rack arrangement according to claim 10, wherein the auxiliary contact means (15) is connected to the centering and contact element (13). 12. The racking device according to claim 11, wherein the auxiliary contact means (15) is mounted on the centering and contact element (13), in particular on its front contact part (14).
2 and 3). 13. The rack device according to claim 11, wherein the auxiliary contact means (15) is in the form of a cage spring with a spring contact plate (53) curved outward. 14. The receiving element (16) is connected to the insertion side (35) of the subrack (50).
) With centering and contact elements (13) with auxiliary contact means (15) on the side faces (54)
14. The rack device according to claim 11, which has a first insertion opening (20) for the rack device (FIGS. 2, 3). 15. The rack arrangement according to claim 1, wherein the auxiliary contact means (25) is connected to the receiving element (16). 16. The receiving element (16) is provided on the insertion side (35) of the subrack (50).
) On the side (54), the first insertion opening (13) for the centering and contact element (13).
16. The rack device according to claim 15, comprising an auxiliary contact means (15) in the contact chamber (28) behind the first insertion opening (20). 17. The receiving element (16) is connected to the insertion side (35) of the subrack (50).
17. The rack device (FIGS. 4 and 5) according to claim 16, having a second insertion opening (27) for inserting the auxiliary contact means (25) into the contact chamber (28) on the side opposite to (2). 18. The auxiliary contact means (25) is connected to a sub-rack side (50).
18. The racking device according to claim 16, wherein the side (31) opposite the side (35) has means (32) for locking to the receiving element, in particular a locking pawl that is pushed out. , FIG. 5). 19. The receiving element (16) has a slit (26) into which a means (32) for locking the receiving element (16) fits.
The rack device as described. 20. The rack arrangement according to claim 15, wherein the auxiliary contact means (25) is in the form of a cage spring with inwardly curved spring contact plates. 6).